Apparatus for and method of generating a pulse signal

摘要

A pulse signal generator comprising a magnetic element (1) able to cause a large Barkhausen jump; a detection member (2) for detecting a magnetic change in the magnetic element to generate a pulse signal; and a pair of magnetic field sources (3, 4, 6, 7) consisting of magnets (3, 4) and magnetic circuit forming members (6, 7) provided on opposite sides of the magnetic element such that their poles are opposed to each other so that when an object passes a pair of poles on one end of the magnetic field sources, a magnetic field applied to the magnetic element changes to cause a large Barkhausen jump in the magnetic element, thus causing the detection means to generate a pulse signal. <IMAGE>